CumInCAD is a Cumulative Index about publications in Computer Aided Architectural Design
supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

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Hits 81 to 100 of 111

_id e2f9
authors Schmidt, Joachim W. and Brodie, Michael L. (editors)
year 1983
title Relational Database Systems : Analysis and Comparison
source xiii, 618 p. New York: Springer-Verlag Pub. Co., 1983. includes bibliography: p. [609]-618
summary An analysis of 14 RDBMS. A detailed catalogue is used to compare the relational databases systems (RDBMS) and their features. It provides generic information that can be used to evaluate RDBMS or DBMS in general
keywords DBMS, information, evaluation, management, practice, software, systems, relational database
series CADline
last changed 2003/06/02 11:58

_id 20d4
id 20d4
authors Sequin, Carlo H. and P.S. Strauss
year 1983
source ACM IEEE Design Automation Conference Proceedings (20th : 1983 : Miami Beach, Florida). pp. 374-381 : ill. includes bibliography.
summary UNIGRAFIX is a three-dimensional graphics modeling environment that runs under the UNIX operating system. It comprises a terse, human-readable descriptive language that allows scene files of complex objects to be created with little overhead. These scenes can be used as input to a set of UNIGRAFIX programs which can be run either as separate functional units, or from within the interactive UNIGRAFIX environment. Programs are available to transform and illuminate the scene descriptions and to display them in a variety of styles on various output devices. The built-in hidden-face and hidden-line elimination routines use a scan- line algorithm which makes strong use of scan-line coherence as well as object coherence.
series CADline
type normal paper
last changed 2005/10/05 05:42

_id ad7d
authors Sethi, Awanti P. and Thompson, Gerald L.
year 1983
title Solution of Constrained Generalized Transportation Problems Using the Pivot and Probe Algorithm
source 17 p. Pittsburgh PA: Design Research Center, CMU, December, 1983. DRC-70-17-83. includes bibliography
summary In this paper the authors use a specialized version of their Pivot and Probe algorithm to solve generalized transportation problems with side constraints. The dual of an m x n generalized transportation problem with t side constraints is a linear program with m + n + t variables and up to m x n constraints. They solve the dual problem using the probe operation to select only the most important constraints to consider. Also presented is a computational experience on problems of sizes up to 180 x 180, having various degrees of density and having as many as 10 side constraints. It was found that for a given size and density, problems become harder to solve as the number of side constraints increases. Ô h)0*0*0*°° Ԍ Also, for a fixed number of side constraints, the solution difficulty increases with size and density. The authors found that their method was able to solve problems of the quoted sizes relatively quickly, with relatively few pivots, and without using basis reinversion
keywords linear programming, topology, planning, constraints, operations research, algorithms, methods
series CADline
last changed 2003/06/02 08:24

_id a04f
authors Smeltzer, G.T.A.
year 1983
title Integration of Design Methods, Industrial Engineering and Informatics
source Proceedings of the International Conference eCAADe [European Computer Aided Architectural Design Education] Brussels (Belgium) 1983, pp. I.20-I.28
summary With the composition of a new CAD education plan the opportunity presents itself to enter into new, valuable relationships with other faculties or faculty-units, at present already working in specific fields as computing or designing. Certain aspects, which are important for CAD-Education, have already been taught for a longer period before CAD became a special, recognized part in the curriculum of the faculty. Because the university cannot afford duplication anymore, and because a unit concerned with CAD cannot have all the necessary knowhow of all specialities at its own disposal, it is an important task of that unit to integrate relevant parts or aspects of faculty or unit-curricula.
keywords CAD Education, Curriculum
series eCAADe
email b.
last changed 2003/05/16 19:36

_id 6e1a
authors Tokumasu, Shinji, Kunitomo, Yoshio and Ohta, Yosimi (et al)
year 1983
title Solid Model in Geometric Modeling System : HICAD
source ACM IEEE Design Automation Conference Proceedings (20th : 1983 : Miami Beach, Florida). pp. 360-366 : ill. includes bibliography
summary The geometric modeling system plays an important role in CAD for mechanical engineering. This paper presents the general purposed conversational geometric modeling system HICAD, which has been developed to confirm the integrated CAD. The HICAD is a generalized geometric model which includes three of the typical geometric modelling, i.e., the implementation method of solid model is especially discussed with the summary of whole system
keywords solid modeling, geometric modeling, CAD
series CADline
last changed 2003/06/02 11:58

_id 452c
authors Vanier, D. J. and Worling, Jamie
year 1986
title Three-dimensional Visualization: A Case Study
source Computer-Aided Architectural Design Futures [CAAD Futures Conference Proceedings / ISBN 0-408-05300-3] Delft (The Netherlands), 18-19 September 1985, pp. 92-102
summary Three-dimensional computer visualization has intrigued both building designers and computer scientists for decades. Research and conference papers present an extensive list of existing and potential uses for threedimensional geometric data for the building industry (Baer et al., 1979). Early studies on visualization include urban planning (Rogers, 1980), treeshading simulation (Schiler and Greenberg, 1980), sun studies (Anon, 1984), finite element analysis (Proulx, 1983), and facade texture rendering (Nizzolese, 1980). With the advent of better interfaces, faster computer processing speeds and better application packages, there had been interest on the part of both researchers and practitioners in three-dimensional -models for energy analysis (Pittman and Greenberg, 1980), modelling with transparencies (Hebert, 1982), super-realistic rendering (Greenberg, 1984), visual impact (Bridges, 1983), interference clash checking (Trickett, 1980), and complex object visualization (Haward, 1984). The Division of Building Research is currently investigating the application of geometric modelling in the building delivery process using sophisticated software (Evans, 1985). The first stage of the project (Vanier, 1985), a feasibility study, deals with the aesthetics of the mode. It identifies two significant requirements for geometric modelling systems: the need for a comprehensive data structure and the requirement for realistic accuracies and tolerances. This chapter presents the results of the second phase of this geometric modelling project, which is the construction of 'working' and 'presentation' models for a building.
series CAAD Futures
last changed 2003/05/16 18:58

_id 0a6e
authors Walters, Roger
year 1986
title CAAD: Shorter-term Gains; Longerterm Costs?
source Computer-Aided Architectural Design Futures [CAAD Futures Conference Proceedings / ISBN 0-408-05300-3] Delft (The Netherlands), 18-19 September 1985, pp. 185-196
summary Assessment of CAAD systems in use is complex: it needs careful qualifications and is often contradictory. It is suggested that little progress has been made in making sense of the impacts of computing on design and design organizations. Impacts are more diverse and complicated than has been assumed. Assessments tend to be either overtly optimistic or pessimistic, yet the need is to be realistic. Moreover, impacts have been the subject of speculation and marketing rather than systematic study. Carefully documented case studies of projects or longitudinal studies of organizational impacts remain the exception. This chapter draws upon recorded user experience reported elsewhere (Walters, 1983)' and presents an assessment of the performance in use of current production systems. It presents an end-user view and also identifies a number of outstanding design research topics It is suggested that different systems in different organizations in different settings will give rise to new impacts. A wide variety of outcomes is possible. It seems unlikely that any simple set of relationships can account for all the data that inquiry reveals. The task becomes one of identifying variables that lead to differential outcomes, as the same cause may lead to different effects (Attewell and Rule, 1984). This becomes a long-term task. Each optimistic impact may be countered by some other more pessimistic impact. Moreover, the changes brought about on design by computing are significant because both beneficial and non- beneficial impacts are present together. Impacts are held in a dynamic balance that is subject to constant evolution. This viewpoint accounts for otherwise conflicting conclusions. It is unlikely that the full range of impacts is yet known, and a wide range of impacts and outcomes already need to be taken into account. It seems that CAD alone cannot either guarantee improved design or that it inevitably leads to some diminished role for the designer. CAD can lead to either possible outcome, depending upon the particular combination of impacts present. Careful matching of systems to design organization and work environment is therefore needed. The design management role becomes crucial.
series CAAD Futures
last changed 1999/04/03 15:58

_id c522
authors Willey, David S. and Bedford, P.
year 1983
title Teaching CAAD at Plymouth Polytechnic
source Proceedings of the International Conference eCAADe [European Computer Aided Architectural Design Education] Brussels (Belgium) 1983, pp. I.30-I.40
summary This paper will describe the policy and objectives for teaching CAAD in the Plymouth School of Architecture and outline the relationship between taught lecture courses in CAAD and the use of CADD in studio projects. It will also indicate the nature the problems raised by this approach with respect to timetable assessment, staff and machine resources, training and program documentation.
keywords CAAD
series eCAADe
last changed 1998/08/18 05:41

_id 413f
authors Wirth, Niklaus
year 1983
title Programming in Modula-2
source 176 p. : ill. New York: Springer-Verlag, 1983. 2nd ed.: includes bibliography and index.--- Text and Monographs in Computer Science Series edited by Gries, David
summary An introduction to programming in general and a manual for programming in Modula-2. It covers all facilities of that language. Part 1 covers basic notions of the variable, expression, assignment, conditional and repetitive statement, and array data structures. Part 2 introduces the important concept of the procedure or subroutine. Part 3 is concerned with data types and structures, and Part 4 introduces the notion of the module
keywords programming, languages, MODULA-2, education
series CADline
last changed 1999/02/12 14:10

_id abb6
authors Woodbury, Robert F. and Glass, Gregory John
year 1983
title VEGA : A Geometric Modelling System
source 11 p. : ill. December, 1983. DRC- 48-04-83. includes bibliography
summary VEGA is an interactive geometric modelling system which has been developed at Carnegie-mellon University primarily for education in architecture and the arts. Its educational use is twofold: first as a medium for description and manipulation of form to aid in creative work and second as a base package of procedures that may be used by advanced architecture students in the creation of specialized modelling packages. VEGA is written in PASCAL. There are versions of VEGA currently running on VAX 11/780 computer under the UNIX and VMS operating systems. VEGA has been designed to run on a stand-alone personal computer. Currently VEGA is being converted to run on Sun Microsystems and PERQ machines. VEGA is used in the undergraduate curriculum of the School of Architecture at Carnegie-Mellon University. Its primary use to date has been as a means to introduce geometric modelling to architecture students who have minimal computer experience. VEGA may be viewed as a complete geometric modelling package or as a programming aid for development of special purpose geometric modelling programs. To date, one such specialized system, a robot arm design package, has been created as a student project. The development of the VEGA system is continuing. Current areas of interest include the development of more powerful geometric operations on polyhedra, parametric shapes and assemblies, instancing of sub- assemblies, user definition of primitive shapes and an interactive macro language for the manipulation of form
keywords assemblies, user interface, modeling, polyhedra, CAD, education, architecture, geometric modeling, solid modeling
series CADline
last changed 2003/06/02 11:58

_id 808b
authors Wyleczuk, Rosanne, Meyer, Lynn and Babcock, Gigi
year 1983
title The Transfer of University Software for Industry Use
source ACM IEEE Design Automation Conference Proceedings (20th : 1983 : Miami Beach, Florida). pp. 756-760. includes bibliography
summary Computer-aided engineering software is generated in abundance in educational institutions. As a major source of design automation software, universities have a lot to offer: a progressive research environment; a seemingly inexhaustible supply of software engineers in the form of undergraduates, graduate engineers, and professors; and a no-risk, multi- disciplinary design lab for experimentation. For these reasons, university software is being widely sought for use in production/commercial environments. This paper examines the interface between industry and the universities during the transfer of design automation software. A printed circuit board router, a graphics subroutine library, and a circuit simulation program are used to illustrate issues arising from the technology transfer. Guidelines to increase the likelihood of success in such transfers of software are provided
keywords industry, engineering, software, CAE, education, technology, communication
series CADline
last changed 2003/06/02 11:58

_id 6d3e
authors Yau, Mann-may and Srihari, Sargur N.
year 1983
title A Hierarchical Data Structure for Multidimensional Digital Images
source Communications of the ACM. July, 1983. vol. 26: pp. 504-515 : ill. includes bibliography
summary A tree data structure for representing multidimensional digital binary images is described. The method is based on recursive subdivision of the d-dimensional space into 2d hyperoctants. An algorithm for constructing the tree of a d- dimensional binary image from the tree of its (d-1)- dimensional cross sections is given. The computational advantages of the data structure and the algorithm are demonstrated both theoretically and in application to a three-dimensional reconstruction of a human brain
keywords algorithms, computational geometry, representation, data structures, solid modeling
series CADline
last changed 2003/06/02 11:58

_id cf2013_023
id cf2013_023
authors Yun, Wu and Miyamoto Funito
year 2013
title An Analysis of Backbone of Outer Spatial Morphology of Campus
source Global Design and Local Materialization[Proceedings of the 15th International Conference on Computer Aided Architectural Design Futures / ISBN 978-3-642-38973-3] Shanghai, China, July 3-5, 2013, pp. 23-37.
summary The research is based on the theory of Space syntax (Hillier and Hanson, 1983). Just as the backbone is essential to compose the human body, two sorts of backbones of the outer spatial configuration of campus are proposed and defined in this thesis. The first is syntactically abstract, which is constituted with the axial lines to represent the relations between the buildings located in campus, and to characterize the essential spatial configuration of campus. The second is a road network which could be represented as a realistic backbone for human activities, and through which human get personal impression and knowledge of outer space of campus. Based on the concept of the backbone, several spatial patterns of campuses are explored and extracted, and the relationships with the spatial cognition and comprehension are quantitatively evaluated.
keywords Backbone, Axial lines map, Road network, Space syntax, Spatial morphology, Space cognition.
series CAAD Futures
last changed 2014/03/24 06:08

_id 2b16
authors Zadeh, Lofti A.
year 1983
title Commonsense Knowledge Representation Based on Fuzzy Logic
source IEEE Computer. IEEE computer society, October, 1983. vol. 16: pp. 61-67 : ill. includes bibliography
summary The approach to the representation of commonsense knowledge described in this article is based on the idea that propositions characterizing commomsense knowledge are for the most part, dispositions -- that is, propositions with implied fuzzy quantifiers. To deal with dispositions systematically the author uses Fuzzy-Logic -- The logic underlying approximate or fuzzy reasoning
keywords AI, fuzzy logic, reasoning, logic, representation
series CADline
last changed 2003/06/02 11:58

_id 0000
authors Bijl, Aart
year 1983
title Know Your Technology - Or: Can Computers Understand Designers?
source Proceedings of the International Conference eCAADe [European Computer Aided Architectural Design Education] Brussels (Belgium) 1983, pp. V.1-V.11
summary Any great expansion of the population of computer users, embracing architects and other ordinary people, will happen only if we change from current computing technology to radically new software technology. Criteria for new technology are discussed, with reference to inadequacies of current technology; we should strive for computers that can understand people. Logic programming is described as one development towards this goal, illustrated by the example of Prolog serving as interpreter of user demands and supporting partial and changing logical models of user activity. Architects can choose computing options now that will put them on a path leading to future new technology. Choice is explained, favouring a software environment that is used by researchers and also supports immediate and practical computer applications. Lessons are drawn for architectural education, to prepare for change that will take place during a student's 40-year working life.
keywords Software Technology, Logic Programming
series eCAADe
last changed 2003/11/21 14:16

_id e10e
authors Billon, R. and Rocca, R.
year 1983
title Comprendre KEOPS: Logiciel de conception assistee par ordinateur en architecture
source Proceedings of the International Conference eCAADe [European Computer Aided Architectural Design Education] Brussels (Belgium) 1983, pp. III.19-III.35
summary En informatique graphique, la méthode la plus courante pour saisir un bâtiment consiste à dêcrire et à stocker en base de données les "pleins": les murs, planchers, composants. Cette procédure est vite fastidieuse, et ne permet pas réellement une véritable conception assistée par ordinateur. KEOPS expérimente une autre méthode qui consiste à décrire l'esquisse par ses "vides", c'est-à-dire les volumes des locaux en trois dimensions. Le logiciel opère automatiquement la transformation "filaire" en composants et ouvrages du bâtiment en exploitant un savoir technologique. Le benéfice? La réduction spectaculaire du temps de saisie et un logiciel de C.A.O. enfin opérationnel en bâtiment.
series eCAADe
last changed 2003/11/21 14:16

_id 88b6
authors Campello, Ruy Eduardo and Maculan, Nelson
year 1983
title A Lower Bound to the Set Partitioning Problem with Side Constraints
source 24 p. : ill. Pittsburgh: Design Research Center, CMU, December, 1983 DRC-70-20-83. includes bibliography.
summary A Lagrangean relaxation approach is proposed to provide a lower bound on the optimal solution of the set partitioning problem with side constraints, which is a general methodology to solve a combinatorial optimization problem. This Lagrangean relaxation approach is accomplished by a subgradient optimization procedure which solves at each iteration a special 0-1 knapsack problem. The approach seems to be promising since it produces feasible integer solutions to the side constraints that can hopefully be the optimal solution to most of the instances of the set partitioning problem with side constraints
keywords mathematics, operations research, relaxation, algorithms, combinatorics, optimization, constraints
series CADline
last changed 2003/06/02 11:58

_id 2328
authors David, B. and Décoppet, A.
year 1983
title Architectural Programming with CAD
source Proceedings of the International Conference eCAADe [European Computer Aided Architectural Design Education] Brussels (Belgium) 1983, pp. II.23-II.35
summary We would like to explain to you the programme for a ten-week workshop spending ten hours per week on the architectural programming of a particular project. We have developed a special methodology which is a synthesis between Architectural Programming Methodology and Integrated CAD Methodology and have used it on two occasions. We would like to describe our experience with this workshop.
series eCAADe
last changed 1998/08/18 05:50

_id e21e
authors Kajiya, J.T.
year 1983
title New techniques for ray tracing procedurally defined objects
source Computer Graphics, 17 3, 91-102
summary We present new algorithms for efficient ray tracing of three procedurally defined objects: fractal surfaces, prisms, and surfaces of revolution. The fractal surface algorithm performs recursive subdi- vision adaptively. Subsurfaces which cannot intersect a given ray are culled from further consideration. The prism algorithm transforms the three-dimensional ray-surface intersection problem into a two-dimensional ray-curve intersection problem, which is solved by the method of strip trees. The surface- of-revolution algorithm transforms the three-dimensional ray-surface intersection problem into a two-dimensional curve-curve intersection problem, which again is solved by strip trees.
series journal paper
last changed 2003/04/23 13:50

_id 0f6e
authors Kalay, Yehuda E.
year 1983
title Modular Menu Mapping and Hit-Testing
source 1983? 17 p. : ill. includes bibliography
summary This paper introduces a method called MODULAR MENU MAPPING, which rationalizes menu layout and trades menu hit-test time with a look up table, thereby reducing the cost of determining the menu box inclusion of the cursor to a single unit of time. To overcome the problem of space required to store the look-up table, a hybrid method called RUN-LENGTH ENCODING is introduced. It reduces the storage space requirements by substituting the two-dimensional look-up table with a linear vector. It does however, require some search, which is nevertheless still much cheaper then the full search of a non-mapped menu
keywords user interface, computer graphics
series CADline
last changed 2003/06/02 11:58

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